CN110058384A - A kind of camera lens - Google Patents
A kind of camera lens Download PDFInfo
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- CN110058384A CN110058384A CN201910462915.7A CN201910462915A CN110058384A CN 110058384 A CN110058384 A CN 110058384A CN 201910462915 A CN201910462915 A CN 201910462915A CN 110058384 A CN110058384 A CN 110058384A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
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Abstract
The invention discloses a kind of camera lenses, including the first lens group, the second lens group and imaging surface being arranged successively by object side to image side；Lens group meets the following conditions: 2.5 < | f1/f system | < 3.2；2.3 < (TTL-D)/f system < 2.8；Wherein, f1 is the focal length of the first lens group, and f system is the system focal length of the camera lens, and TTL is the optics overall length of the camera lens, and D is the distance between second lens group and the imaging surface.Lens group due in embodiments of the present invention, being arranged successively two lens groups by object side to image side in particular order in camera lens, and in camera lens meets: 2.5 < | f1/f system | < 3.2；2.3 < (TTL-D)/f system < 2.8 can satisfy the requirement by image recognition license board information and the requirement of 4K resolution camera.
Description
Technical field
The present invention relates to optical image technology field more particularly to a kind of camera lenses.
Background technique
As traffic network is increasingly intensive, traffic is increasingly busy, in order to safeguard traffic safety, prevent traffic jam, realization
It is in perfect order under busy road conditions；A day and night confocal high-resolution camera lens is provided with reality to develop intelligent transportation system
Meaning.Zoom lens major part structure now on the market is simple, performance indicator is low, can only be with 200- in the clarity of image
The SD CCD or cmos camera of 3000000 pixels are adapted to, and the existing higher camera lens of resolution ratio also can only achieve 6,000,000 pixels, are clapped
It is general to take the photograph effect, picture value is little.Resolution of lens in the prior art is lower, much can not meet present 4K and has differentiated
The requirement of rate video camera.
Summary of the invention
The embodiment of the invention provides a kind of camera lenses, to solve the problems, such as that resolution of lens in the prior art is lower.
The embodiment of the invention provides a kind of camera lens, the camera lens includes the first lens being arranged successively by object side to image side
Group, the second lens group and imaging surface；
Lens group meets the following conditions:
2.5 < | f1/f system | < 3.2；
2.3 < (TTL-D)/f system < 2.8；
Wherein, f1 is the focal length of the first lens group, and f system is the system focal length of the camera lens, and TTL is the light of the camera lens
Overall length is learned, D is the distance between second lens group and the imaging surface.
Further, first lens group includes the first positive power lens being arranged successively by object side to image side,
One negative-power lenses, the first negative power sub-lens group and the first positive light coke sub-lens group；
The first negative power sub-lens group includes the second negative-power lenses and third negative-power lenses；
The first positive light coke sub-lens group includes the second positive power lens and the 4th negative-power lenses.
Further, first positive power lens include convex lens, towards object in first positive power lens
The surface of side is convex surface；
First negative-power lenses include meniscus lens, towards the surface of image side in first negative-power lenses
For concave surface；
Second negative-power lenses include biconcave lens；
The third negative-power lenses include meniscus lens, towards the surface of image side in the third negative-power lenses
For concave surface；
Second positive power lens include convex lens, are towards the surface of image side in second positive power lens
Convex surface；
4th negative-power lenses include meniscus lens, towards the surface of image side in the 4th negative-power lenses
For convex surface.
Further, second lens group includes the second positive light coke sub-lens being arranged successively by object side to image side
Group, the 4th positive power lens and the 6th negative-power lenses；
The second positive light coke sub-lens group includes the 5th negative-power lenses and third positive power lens.
Further, the third positive power lens include biconvex lens；
5th negative-power lenses include biconcave lens；
4th positive power lens include convex lens, are towards the surface of image side in the 4th positive power lens
Convex surface；
6th negative-power lenses include meniscus lens, towards the surface of image side in the 6th negative-power lenses
For concave surface.
It further, further include prism group between second lens group and imaging surface, the prism group includes two ribs
Mirror；The contact surface of described two prisms is provided with the film layer with light splitting function；The light emission side of each prism is respectively equipped with correspondence
Imaging surface.
Further, optical filter is equipped between each prism and corresponding imaging surface.
Further, light bar is provided between first lens group and the second lens group.
Further, the refractive index of first positive power lens and the 6th negative-power lenses is all larger than 1.90.
Further, first negative-power lenses, third positive power lens and the 4th positive power lens use
Low-dispersion material；The Abbe number of first negative-power lenses, third positive power lens and the 4th positive power lens is equal
Greater than 60.
The embodiment of the invention provides a kind of camera lens, the camera lens includes the first lens being arranged successively by object side to image side
Group, the second lens group and imaging surface；Lens group meets the following conditions: 2.5 < | f1/f system | < 3.2；2.3 < (TTL-D)/f
System < 2.8；Wherein, f1 is the focal length of the first lens group, and f system is the system focal length of the camera lens, and TTL is the camera lens
Optics overall length, D are the distance between second lens group and the imaging surface.Due in embodiments of the present invention, in camera lens
In two lens groups are arranged successively by object side to image side in particular order, and lens group in camera lens meets: 2.5 < |
F1/f system | < 3.2；2.3 < (TTL-D)/f system < 2.8, therefore resolution of lens provided in an embodiment of the present invention is higher,
And it can satisfy and required by the requirement of image recognition license board information and 4K resolution camera etc..
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is camera lens schematic diagram provided in an embodiment of the present invention；
Fig. 2 is lens construction schematic diagram provided in an embodiment of the present invention；
Fig. 3 is another lens construction schematic diagram provided in an embodiment of the present invention；
Fig. 4 is the lens construction schematic diagram that the embodiment of the present invention 1 provides；
Fig. 5 is transfer curve figure of the camera lens that provides of the embodiment of the present invention 1 under white light scene；
Fig. 6 is transfer curve figure of the camera lens that provides of the embodiment of the present invention 1 under infrared 850nm state；
Fig. 7 is the lens construction schematic diagram that the embodiment of the present invention 2 provides；
Fig. 8 is transfer curve figure of the camera lens that provides of the embodiment of the present invention 2 under white light scene；
Fig. 9 is transfer curve figure of the camera lens that provides of the embodiment of the present invention 2 under infrared 850nm state.
Specific embodiment
The present invention will be describe below in further detail with reference to the accompanying drawings, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
All other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Fig. 1 is camera lens schematic diagram provided in an embodiment of the present invention, and the camera lens includes being arranged successively by object side to image side
First lens group G1, the second lens group G2 and imaging surface；
Lens group meets the following conditions:
2.5 < | f1/f system | < 3.2；
2.3 < (TTL-D)/f system < 2.8；
Wherein, f1 is the focal length of the first lens group, and f system is the system focal length of the camera lens, and TTL is the light of the camera lens
Overall length is learned, D is the distance between second lens group and the imaging surface.
Each lens group in camera lens provided in an embodiment of the present invention has its corresponding focal length f, in order to provide a kind of big point
The camera lens of resolution, the lens group meet following relationship:
2.5 < | f1/f system | < 3.2；
2.3 < (TTL-D)/f system < 2.8；
Wherein, f1 is the focal length of the first lens group, and f system is the system focal length of the camera lens, and TTL is the light of the camera lens
Overall length is learned, D is the distance between second lens group and the imaging surface.
Due in embodiments of the present invention, being arranged successively two thoroughly by object side to image side in particular order in camera lens
Microscope group, and the lens group in camera lens meets: 2.5 < | f1/f system | < 3.2；2.3 < (TTL-D)/f system < 2.8, therefore
Resolution of lens provided in an embodiment of the present invention is higher, and can satisfy the requirement by image recognition license board information and 4K
The requirement such as resolution camera.
In embodiments of the present invention, the absolute value of the focal length and the ratio of the focal length of the camera lens of first lens group is big
In 2.5 and less than 3.2.The absolute value of the ratio of the focal length of the focal length and camera lens of first lens group is too small, although can make camera lens
Length shortens, but will increase spherical aberration, influences picture quality, and the manufacturability of camera lens can reduce.And the first lens
Group focal length and camera lens focal length ratio absolute value it is too big, although can reduce spherical aberration, improve picture quality and
The manufacturability of camera lens, but lens length can be bigger.It the spherical aberration of lens length and camera lens and can make in order to balance
The property made provides the range of the absolute value of the ratio of the focal length of the first lens group and the focal length of camera lens in embodiments of the present invention.
In embodiments of the present invention, the absolute value of the ratio of the focal length of the focal length and camera lens of the first lens group is greater than 2.5 and less than 3.2.
The spherical aberration and manufacturability of lens length and camera lens can preferably be taken into account.
For example, the absolute value of the ratio of the focal length of the focal length and camera lens of the first lens group can be 2.7,2.8,3.0 etc..
The focal length of first lens group be f before, the focal length of camera lens be f system, meet relational expression before f between f system: 2.5 <
| before f/f system | < 3.2.
Fig. 2 is lens construction schematic diagram provided in an embodiment of the present invention, in order to further increase the image quality of camera lens, institute
Stating the first lens group G1 includes the first positive power lens 1 being arranged successively by object side to image side, the first negative-power lenses 2,
First negative power sub-lens group and the first positive light coke sub-lens group；
First negative power sub-lens group includes the second negative-power lenses 3 and third negative-power lenses 4；
First positive light coke sub-lens group includes the second positive power lens 5 and the 4th negative-power lenses 6.
In order to which further such that system can be compact, second negative-power lenses 3 and third negative-power lenses 4 can
With gluing connection or it is fitted and connected；Second positive power lens 5 and the 4th negative-power lenses 6 can glued connection or
Person is fitted and connected.
Specifically, in order to further increase the image quality of camera lens, as shown in Fig. 2, the first positive power lens packet
It includes convex lens, towards the surface of object side is convex surface in first positive power lens；First negative-power lenses include
Meniscus lens towards the surface of image side is concave surface in first negative-power lenses；Second negative-power lenses include
Biconcave lens；The third negative-power lenses include meniscus lens, towards the table of image side in the third negative-power lenses
Face is concave surface；Second positive power lens include convex lens, towards the surface of image side in second positive power lens
For convex surface；4th negative-power lenses include meniscus lens, towards the surface of image side in the 4th negative-power lenses
For convex surface.
Second lens group includes the second positive light coke sub-lens group being arranged successively by object side to image side, the 4th positive light
Power lenses and the 6th negative-power lenses；The second positive light coke sub-lens group includes the 5th negative-power lenses and third
Positive power lens.
In order to further such that system can be compact, the 5th negative-power lenses and third positive power lens can be with
Gluing connection is fitted and connected.
In order to further increase the image quality of image, the third positive power lens include biconvex lens；Described
Five negative-power lenses include biconcave lens；4th positive power lens include convex lens, and the 4th positive light coke is saturating
In mirror towards image side surface be convex surface；6th negative-power lenses include meniscus lens, and the 6th negative power is saturating
In mirror towards image side surface be concave surface.
Visible light and infrared light are optimized respectively in order to realize, Fig. 3 is another camera lens provided in an embodiment of the present invention
Structural schematic diagram, as shown in figure 3, further including prism group between the second lens group G2 and imaging surface, the prism group includes
Two prisms；The contact surface of described two prisms is provided with the film layer with light splitting function；The light emission side of each prism is set respectively
There is corresponding imaging surface N.Described two prisms glued can be connected or be fitted and connected.
As shown in figure 3, prism group is light-dividing device, it is generally used for it will be seen that light and infrared light separate.Two in prism group
A prism 11 can be separately connected imager chip, such as complementary metal oxide semiconductor (Complementary Metal
Oxide Semiconductor, CMOS) chip etc..Imager chip receives visible images and infrared light image respectively, then leads to
Crossing Image Fusion can will be seen that light image and infrared light image carry out fusion treatment.It is may be implemented in this way in low-light (level) ring
Under border, the weaker white light light filling of use realizes the light filling to scene, thus after guaranteeing fusion in conjunction with infrared light light filling appropriate
Picture quality.It avoids in the prior art using strong white light flashing light to sense is dazzle the eyes caused by driver or pedestrian, mentions significantly
The high safety of road traffic.
Optical filter M, first lens group and the second lens group are equipped between each prism and corresponding imaging surface
Between be provided with light bar P.
Light bar P can be fixed and invariable device；Light bar P can also be adjusted automatically continuously, meet contemporary optics instrument with this
The intelligent requirements of device.Optical filter M is the optical device for choosing required radiation wave band.It is image planes N on the right side of optical filter M.
Camera lens provided in an embodiment of the present invention, using the optical lens of 10 patterns, 10 lens altogether.Each lens distribution
Rationally, the lens group and in camera lens meets: 2.5 < | f1/f system | < 3.2；2.3 < (TTL-D)/f system < 2.8, camera lens
Resolution ratio is larger, and can satisfy and required by the requirement of image recognition license board information and 4K resolution camera etc..
In order to improve the refractive index of camera lens, reduce camera lens total length, the first positive power lens 1 and the 6th negative power are saturating
The refractive index of mirror 10 is all larger than 1.90.Such as first the refractive index of positive power lens 1 and the 6th negative-power lenses 10 can be with
Being the 2.0,2.1 etc., and first positive power lens 1 can identical not with the refractive index of the 6th negative-power lenses 10 yet
Together.
In addition, general spheric glass light is easier than center portion to the edge part focal plane Shi Qi after entering eyeglass
Serious refraction and bending are generated, this phenomenon will lead to sharpness and contrast reduces and the generation of hot spot, so that image
Quality decline.And such aberration is known as spherical aberration.In embodiments of the present invention, the first positive power lens 1 and the 6th negative light
The refractive index of power lenses 10 is all larger than 1.90, can also reduce spherical aberration, improves picture quality.
The refractive index of first positive power lens, 1 sum is nd1, the refractive index of the 6th negative-power lenses is nd10.Wherein,
Nd1 > 1.90, nd10 > 1.90.
First positive power lens 1 and the 6th negative-power lenses 10 are all made of Super Hi-Index material, and mirror can be improved
The refractive index of head, and then improve the resolution ratio of camera lens.Also, Super Hi-Index material is used, the first positive light focus can also be reduced
The thickness of lens 1 and the 6th negative-power lenses 10 is spent, and then reduces the total length of camera lens.
In order to realized in the complete burnt section of camera lens it is day and night confocal and without thermalization, that is, at -40 degrees Celsius to 80 it is Celsius
Degree can blur-free imaging, in embodiments of the present invention, first negative-power lenses 2, third positive power lens 8 and the 4th
Positive power lens 9 use low-dispersion material；First negative-power lenses, third positive power lens and the 4th positive light focus
The Abbe number of degree lens is all larger than 60.In addition, the first negative-power lenses, third positive power lens and the 4th positive light coke are saturating
The Abbe number of mirror is all larger than 60, can also reduce the color difference of image, to improve picture quality.For example, the first negative power is saturating
The Abbe number of mirror, third positive power lens and the 4th positive power lens can be 65,68,70 etc..Also, the first negative light focus
The Abbe number of degree lens, third positive power lens and the 4th positive power lens can be the same or different.
The Abbe number of first negative-power lenses 2 is Vd2, the Abbe number of third positive power lens 8 be Vd8, the 4th just
The Abbe number of power lenses 9 is Vd9.Wherein, Vd2 > 60, Vd8 > 60, Vd9 > 60.
The focal length of camera lens provided in an embodiment of the present invention is about 30 millimeters.The relative aperture of the camera lens is larger, can be
1.2,1.3 etc., so as to improve the image quality under low-light scene, and the benefit of visible light and infrared light can be reduced simultaneously
Luminous intensity reduces the power consumption of equipment.The field angle of the camera lens is about 33 degree.It should be noted that being to acquire license plate image
Example, if the field angle of camera lens is too big, accounting of the license plate image in picture will very little, license board information is unintelligible, influence
The identification of license board information.And if the field angle of camera lens is too small, it is possible to which whole license plates can not be seen by appearing in picture, also can
Influence the identification of license board information.In order to guarantee to carry out the identification of license board information, camera lens is provided in the embodiment of the present invention
Field angle is about 33 degree, can preferably meet license board information identification and require, and be able to satisfy the requirement of recognition of face.
Also, in embodiments of the present invention, the length of the camera lens is less than 110 millimeters；Wherein, the length of the camera lens is
Distance of the first positive power lens leftmost vertices to imaging surface.Camera lens provided in an embodiment of the present invention is small in size, overall length
TTL is can be controlled within 110 millimeters, therefore can satisfy the demand of video camera miniaturization, there is very strong adaptability.Certainly, root
According to the needs of product, the length of camera lens can also be increased.For example, camera lens is in integrally amplification, the length of camera lens may be more than
110 millimeters.Therefore the length of camera lens provided in an embodiment of the present invention is not limited to less than 110 millimeters.
Also, camera lens provided in an embodiment of the present invention, it is reasonable to select glass lens material in design, obtain color difference
To better correction, daytime and night even quality are promoted, meets the requirement of monitor camera day and night, and take into account -40 and take the photograph
Family name's degree to 80 degree Celsius temperature ranges requirement.
In addition, when the radius of curvature of camera lens, thickness etc. are integrally scaled, the Abbe number of each lens, folding in camera lens
It is constant to penetrate rate, the numerical value such as aperture size, field angle are constant, and the focal length and image planes size of camera lens zoom in and out in proportion.
It carries out below for lens parameters provided in an embodiment of the present invention apart from explanation.
Embodiment 1:
Lens focus range is 30.2mm, and relative aperture Fno is 1.2, and camera lens overall length TTL is 100mm.The song of each lens
The data such as rate radius, center thickness, refractive index nd and Abbe constant Vd, as shown in table 1:
Table 1
It should be noted that the face number in table 1 is in lens construction schematic diagram shown in FIG. 1, by left-to-right lens
Face number.
D20 is respectively as follows: 4.704 and 4.772 under the conditions of visible light and infrared 850nm in table 1.
In embodiments of the present invention, before f: -90.41mm；F system: 30.2mm；The length TTL:100mm of camera lens；Prism group
Thickness D prism: 25mm；| before f/f system |=2.99；(TTL-D prism)/system=2.48 f.
nd1:1.954；nd10:1.923；Vd2:81.61；Vd8:68.62；Vd9:75.50.
Fig. 4 is lens construction schematic diagram provided in an embodiment of the present invention.Detailed optics is carried out below by embodiment 1
Network analysis is further described camera lens provided by the present embodiment 1.Optical transfer function is for evaluating an optical system
More accurate, the intuitive and common mode of image quality, curve is higher, more smooth, shows that the image quality of system is better, to picture
Difference has carried out good correction.
Fig. 5 is transmission function (MTF) curve graph of camera lens under white light scene, and abscissa is resolution ratio, unit lp/
Mm, ordinate are MTF numerical value, and similar curve hereafter no longer repeats.As shown in figure 5, curve smoothing decline and concentration.?
Still ensure that mtf value is greater than 0.3 when 160lp/mm.To realize system under white light scene, lens performance reaches ten million picture
The resolution ratio of element.
Fig. 6 is transmission function (MTF) curve graph of camera lens under infrared 850nm state, curve smoothing decline and concentration.?
Still ensure that mtf value is greater than 0.3 when 160lp/mm, numerical requirements are more slightly lower than state of white light.Therefore, in infrared 850nm state
Under, still ensure that the resolution ratio of camera lens is higher.
Embodiment 2:
Lens focus range is 30.8mm, and relative aperture Fno is 1.2, and camera lens overall length TTL is 107.96mm.Each lens
The data such as radius of curvature, center thickness, refractive index nd and Abbe constant Vd, as shown in table 2:
| Face number | Radius of curvature | Thickness | Refractive index | Abbe number |
| 1 | 39.873 | 6.255 | 2.001 | 29.13 |
| 2 | 104.004 | 0.150 | ||
| 3 | 27.913 | 9.859 | 1.589 | 61.25 |
| 4 | 12.268 | 8.184 | ||
| 5 | -51.981 | 2.956 | 1.699 | 30.05 |
| 6 | 19.656 | 6.693 | 1.986 | 16.48 |
| 7 | 29.677 | 1.177 | ||
| 8 | -355.382 | 4.897 | 1.755 | 52.34 |
| 9 | -11.144 | 0.900 | 2.003 | 19.32 |
| 10 | -29.407 | 5.344 | ||
| Light bar | Plane | 3.993 | ||
| 12 | -26.773 | 0.900 | 1.581 | 40.75 |
| 13 | 34.577 | 8.021 | 1.593 | 68.62 |
| 14 | -21.503 | 0.140 | ||
| 15 | 89.865 | 4.510 | 1.593 | 68.62 |
| 16 | -61.168 | 0.140 | ||
| 17 | 57.854 | 3.779 | 1.923 | 20.88 |
| 18 | Plane | 3.000 | ||
| 19 | Plane | 28.500 | 1.517 | 64.21 |
| 20 | Plane | D20 | ||
| 21 | Plane | 0.500 | 1.517 | 64.21 |
| 22 | Plane | 1.200 |
Table 2
D20 is respectively as follows: 6.798,6.863 under the conditions of visible light and infrared 850nm in table 2.
In embodiments of the present invention, before f: -87.42mm；F system: 30.8mm；TTL:108；D prism: 28.5；| before f/f
System |=2.84；(TTL-D prism)/system=2.58 f.
nd1:2.001；nd10:1.923；Vd2:61.25；Vd8:68.62；Vd9:68.62.
Fig. 7 is lens construction schematic diagram provided in an embodiment of the present invention.Detailed optics is carried out below by embodiment 2
Network analysis is further described camera lens provided by the present embodiment 2.Fig. 8 is transmission function (MTF) of the camera lens under white light scene
Curve graph, abscissa are resolution ratio, and unit lp/mm, ordinate is MTF numerical value, and similar curve hereafter no longer repeats.Such as
Shown in Fig. 8, curve smoothing decline and concentration.Still ensure that mtf value is greater than 0.3 in 160lp/mm.Exist to realize system
Under white light scene, lens performance reaches the resolution ratio of ten million pixel.
Fig. 9 is transmission function (MTF) curve graph of camera lens under infrared 850nm state, curve smoothing decline and concentration.?
Still ensure that mtf value is greater than 0.3 when 160lp/mm, numerical requirements are more slightly lower than state of white light.Therefore, in infrared 850nm state
Under, still ensure that the resolution ratio of camera lens is higher.
The embodiment of the invention provides a kind of camera lens, the camera lens includes the first lens being arranged successively by object side to image side
Group, the second lens group and imaging surface；Lens group meets the following conditions: 2.5 < | f1/f system | < 3.2；2.3 < (TTL-D)/f
System < 2.8；Wherein, f1 is the focal length of the first lens group, and f system is the system focal length of the camera lens, and TTL is the camera lens
Optics overall length, D are the distance between second lens group and the imaging surface.Due in embodiments of the present invention, in camera lens
In two lens groups are arranged successively by object side to image side in particular order, and lens group in camera lens meets: 2.5 < |
F1/f system | < 3.2；2.3 < (TTL-D)/f system < 2.8, therefore resolution of lens provided in an embodiment of the present invention is higher,
And it can satisfy and required by the requirement of image recognition license board information and 4K resolution camera etc..
Camera lens provided in an embodiment of the present invention is from left to right arranged successively 10 lens according to particular order, and passes through
The distribution of the focal power of each optical lens, while using and being adapted optical glass material, so that the structure type of lens system,
The parameters such as refractive index, the Abbe number of lens are matched with image-forming condition, and then make the spherical aberration of lens system, coma, astigmatism, field
Song, ratio chromatism, chromatism of position are corrected well, thus reach big field angle, bigger aperture, higher resolution ratio,
Highest supports 4K pixel camera machine, more preferably infrared confocal and better athermal performance；And compact-sized, outer dimension
Small, all optical lenses are all made of spherical design, and cold machining process is functional, and production cost is low；It can be widely applied to pacify
Anti- monitoring field realizes that round-the-clock ultra high-definition picture is shown.
In addition, three lens glues are combined together referred to as three balsaming lens, its main feature is that gluing technique is more complex, three is glued
It is difficult detected when lens go wrong, is a kind of very intractable type of lenses.It the use of three glued camera lenses is in lens design
Lower very unwise move.In embodiments of the present invention, camera lens is formed using cemented double lens and single lens, does not use three cemented doublets,
Therefore camera lens manufacture provided in an embodiment of the present invention, detection are simple, and manufacturability is good.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of camera lens, which is characterized in that the camera lens include the first lens group being arranged successively by object side to image side, second thoroughly
Microscope group and imaging surface；
Lens group meets the following conditions:
2.5 < | f1/f system | < 3.2；
2.3 < (TTL-D)/f system < 2.8；
Wherein, f1 is the focal length of the first lens group, and f system is the system focal length of the camera lens, and TTL is that the optics of the camera lens is total
Long, D is the distance between second lens group and the imaging surface.
2. camera lens as described in claim 1, which is characterized in that first lens group includes being arranged successively by object side to image side
The first positive power lens, the first negative-power lenses, the first negative power sub-lens group and the first positive light coke sub-lens
Group；
The first negative power sub-lens group includes the second negative-power lenses and third negative-power lenses；
The first positive light coke sub-lens group includes the second positive power lens and the 4th negative-power lenses.
3. camera lens as claimed in claim 2, which is characterized in that first positive power lens include convex lens, and described
In one positive power lens towards object side surface be convex surface；
First negative-power lenses include meniscus lens, in first negative-power lenses towards image side surface be it is recessed
Face；
Second negative-power lenses include biconcave lens；
The third negative-power lenses include meniscus lens, in the third negative-power lenses towards image side surface be it is recessed
Face；
Second positive power lens include convex lens, in second positive power lens towards image side surface be it is convex
Face；
4th negative-power lenses include meniscus lens, in the 4th negative-power lenses towards image side surface be it is convex
Face.
4. camera lens as claimed in claim 2, which is characterized in that second lens group includes being arranged successively by object side to image side
The second positive light coke sub-lens group, the 4th positive power lens and the 6th negative-power lenses；
The second positive light coke sub-lens group includes the 5th negative-power lenses and third positive power lens.
5. camera lens as claimed in claim 4, which is characterized in that the third positive power lens include biconvex lens；
5th negative-power lenses include biconcave lens；
4th positive power lens include convex lens, in the 4th positive power lens towards image side surface be it is convex
Face；
6th negative-power lenses include meniscus lens, in the 6th negative-power lenses towards image side surface be it is recessed
Face.
6. camera lens as described in claim 1, which is characterized in that further include prism between second lens group and imaging surface
Group, the prism group include two prisms；The contact surface of described two prisms is provided with the film layer with light splitting function；Each rib
The light emission side of mirror is respectively equipped with corresponding imaging surface.
7. camera lens as claimed in claim 6, which is characterized in that be equipped with optical filter between each prism and corresponding imaging surface.
8. camera lens as described in claim 1, which is characterized in that be provided with light between first lens group and the second lens group
Column.
9. camera lens as described in claim 4 or 5, which is characterized in that first positive power lens and the 6th negative power
The refractive index of lens is all larger than 1.90.
10. camera lens as described in claim 4 or 5, which is characterized in that first negative-power lenses, third positive light coke
Lens and the 4th positive power lens use low-dispersion material；First negative-power lenses, third positive power lens and
The Abbe number of 4th positive power lens is all larger than 60.
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|---|---|---|---|
| CN201910462915.7A CN110058384B (en) | 2019-05-30 | 2019-05-30 | Lens |
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|---|---|---|---|
| CN201910462915.7A CN110058384B (en) | 2019-05-30 | 2019-05-30 | Lens |
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| CN110058384A true CN110058384A (en) | 2019-07-26 |
| CN110058384B CN110058384B (en) | 2021-08-27 |
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| CN111929811A (en) * | 2020-08-04 | 2020-11-13 | 湖北禾口光电有限公司 | Lens |
| CN112666684A (en) * | 2020-12-23 | 2021-04-16 | 福建福光股份有限公司 | Radiation-resistant wide-angle lens |
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| Publication number | Publication date |
|---|---|
| CN110058384B (en) | 2021-08-27 |
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